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Tendency for higher IgG and lower IgA levels in S. aureus nasal carriers. IgG and IgA levels for total S. aureus 8325-4 (spa) bacterial lysates were measured by ELISA and individual data points are shown for noncarriers (open circle) (n = 17), transient carriers (gray-shaded circle) (n = 13), and permanent carriers (filled circle) (n = 9). Median values are indicated for all groups.
